The problem in mail template with URL construction containing the email address.

The problem in mail template with URL construction containing the email address.

We have many Zoho mail template in which we create a link from User Email, Contact Email and another parameter.

For example, 
www.name.com/productID?parameter1= ${User.Email}&parameter2= ${Contacts.Email}&...

Before today on click we got correct URL:

www.name.com/productID?parameter1= user1@domain.com&parameter2= client100@domainclient.com&...

But today we found an error. After on click from mail, we get URL
www.name.com/productID?parameter1= user1@domain.com&parameter2= client100@domainclient.com&...

The symbol "@" Zoho changed on "@".

Why? All our logic has stopped working:(

Correct URL didn't see in Zoho SalesIQ.

Please solve this problem.